package cn.pengge.springaop.reflection;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

//动态创建对象
public class Test09 {


    public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException, NoSuchMethodException, InvocationTargetException, NoSuchFieldException {

        //获得class对象
        Class c1 = Class.forName("cn.pengge.springaop.reflection.User");

        //构造一个对象
        User user = (User) c1.newInstance();
        System.out.println("user = " + user);

        //通过构造器创建对象
        Constructor constructor = c1.getDeclaredConstructor(String.class, int.class, int.class);
        User user2 =(User) constructor.newInstance("李明",23,424);
        System.out.println("user2 = " + user2);

        //通过反射调用普通方法
        User user3 = (User) c1.newInstance();
        //通过反射获取一个方法
        Method setName = c1.getDeclaredMethod("setName", String.class);
        //invoke 激活
        //对象：方法的值
        setName.invoke(user3,"鹏哥");
        System.out.println(user3.getName());

        System.out.println("12321321312333333333333333333333");
        //通过反射获取属性
        User user4 =(User) c1.newInstance();
        Field name = c1.getDeclaredField("name");

        //不能直接操作私有属性 我们需要关闭程序的安全检测
        name.setAccessible(true);//
        name.set(user4,"nsadsad");
        System.out.println(user4.getName());


    }
}
